Localization of linked 125I seeds in postimplant TRUS images for prostate brachytherapy dosimetry

Conclusion: Our results have demonstrated that a high percentage (>85%) of the implanted 125I seeds can be directly visualized in postimplant TRUS images when the seeds and spacers are linked to preclude seed migration and rotation and when the images are obtained with a high-resolution TRUS probe. Moreover, it is possible to localize 100% of the seeds with the mechanism of linked seeds because the locations of the missing seeds can be determined from the known construction of the arrays.